Chesapeake Bay Water Quality Standards Attainment Deficit

This app is designed for visualizing segment-level results for the Chesapeake Bay water quality standards attainment deficit between the 1985-1987 assessment period and the 2020-2022 assessment period.

The attainment indicator has been approved and published on Chesapeake Progress. This app was last updated on October 22, 2024.

Notes:

* Attainment deficit: 0% = full attainment; -100% = full non-attainment.

* Assessment period: Year represents the first year of a 3-year assessment period, e.g., year 1985 represents the 1985-1987 period.

* Water quality criteria: DO = dissolved oxygen, CHLA = chlorophyll-a. See Table 1 under 'About' for more information.

* Designated uses: MSN_DO = migratory spawning and nursery DO; OW_DO = open water DO; DW_DO = deep water DO; DC_DO = deep channel DO; CHLspr = spring chlorophyll-a; CHLsum = summer chlorophyll-a.